My old Ultra Roku is having problems now after this update. It is not recognizing my TV as 4k and switched to HD only. 4k used to work until now and I have done all the usual disconnect and restart. It could be related to HDCP 2.2 no longer working with Roku units.
Model - 4230X; S# - 4E654J081450; Software - 10.5 Build 4201